drm/xe: Remove devcoredump during driver release

This will remove devcoredump from file system and free its resources
during driver unload.

This fix the driver unload after gpu hang happened, otherwise this
it would report that Xe KMD is still in use and it would leave the
kernel in a state that Xe KMD can't be unload without a reboot.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jonathan Cavitt <jonathan.cavitt@intel.com>
Acked-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409200206.108452-2-jose.souza@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_devcoredump.c

@@ -9,6 +9,8 @@
 #include <linux/devcoredump.h>
 #include <generated/utsrelease.h>
 
+#include <drm/drm_managed.h>
+
 #include "xe_device.h"
 #include "xe_exec_queue.h"
 #include "xe_force_wake.h"
@@ -235,5 +237,14 @@ void xe_devcoredump(struct xe_sched_job *job)
 	dev_coredumpm(xe->drm.dev, THIS_MODULE, coredump, 0, GFP_KERNEL,
 		      xe_devcoredump_read, xe_devcoredump_free);
 }
-#endif
 
+static void xe_driver_devcoredump_fini(struct drm_device *drm, void *arg)
+{
+	dev_coredump_put(drm->dev);
+}
+
+int xe_devcoredump_init(struct xe_device *xe)
+{
+	return drmm_add_action_or_reset(&xe->drm, xe_driver_devcoredump_fini, xe);
+}
+#endif

drivers/gpu/drm/xe/xe_devcoredump.h

@@ -11,10 +11,16 @@ struct xe_sched_job;
 
 #ifdef CONFIG_DEV_COREDUMP
 void xe_devcoredump(struct xe_sched_job *job);
+int xe_devcoredump_init(struct xe_device *xe);
 #else
 static inline void xe_devcoredump(struct xe_sched_job *job)
 {
 }
+
+static inline int xe_devcoredump_init(struct xe_device *xe)
+{
+	return 0;
+}
 #endif
 
 #endif

drivers/gpu/drm/xe/xe_device.c

@@ -20,6 +20,7 @@
 #include "regs/xe_regs.h"
 #include "xe_bo.h"
 #include "xe_debugfs.h"
+#include "xe_devcoredump.h"
 #include "xe_dma_buf.h"
 #include "xe_drm_client.h"
 #include "xe_drv.h"
@@ -579,6 +580,9 @@ int xe_device_probe(struct xe_device *xe)
 			return err;
 	}
 
+	err = xe_devcoredump_init(xe);
+	if (err)
+		return err;
 	err = drmm_add_action_or_reset(&xe->drm, xe_driver_flr_fini, xe);
 	if (err)
 		return err;